Improved pulley-sheave



UNITED STATES PATENT FFICE?,d

vICToR KNECHT, CF CINCINNATI, CHIC.

IM PROVED PU LLEY-SHEAVE.

Specification forming part of Letters Patent No. 103,474, dated May 24,1870.

I, VICTOR KNECHT, of Cincinnati, Hamilton county, Ohio, have invented anew and useful Manufacture of Cast Pulley-Sheaves, of which thefollowing is a specification:

N ntme and Objects of the Invention.

My improvement consists in substituting for the continuous ridges forholding the cord on the periphery of a customary castpulley-sheave anarrangement of alternating lugs or cheeks, which enables such sheaves tobe more easily and cheaply molded, and with less expenditure of metal.

General Description with reference to the Drawfing.

Figure l represents, by perspective view, the pattern for a pair of myimproved sheaves. Fig. 2 is a perspective view of the follow-board usedtherewith. Fig. 3 is a perspective view of the follow-board supportingthe drag and pattern. Fig. 4 shows the drag after having been rammed,with the pattern and cope in position, the follow board having beenremoved. Fig. 5 is a top view of the same. Fig. 6 is a vertical sectionat the line w x. Fig. 7 is a perspective view of the finished sheave.

Instead of the continuous flanges or ridges which form the customaryscored periphery of a pulley-sheave, I confine the cord upon theperiphery of my sheave by means of two series of lugs or cheeks, A A',which project alternately on opposite sides of the sheave.

This form of sheave may be molded without the necessity of separablepatterns or of hard cores or chills and in one-halt' the time, and witha less skillful workman and a saving of metal over the customary form,so that the manufacture is cheapened both in labor and material.

The improvement is applicable to any description of cast sheave, wheel,or axle-pulley, for use with cords or chains.

By the use of suitable sprues, B, a number of such sheaves may be moldedat one time.

Claim.

Set my hand.

VICTOR KNECHT. NVitnesses:

GEO. H. KNIGHT, J AMES H. LAYMAN.

